Pick-matching mechanism for automatic weft-replenishing looms.



, G. H. LEITNER L W. E. JOHNSON. PICK MATCHING MBGHANISM TOR AUTOMATICWBTT RBPLBNISHING Looms.

APPLICATION FILED JUNE 2G, w07.

Patented Ju1y'13, 1909.

G. H. LEITNERL W. E. JOHNSUN. P10K MATCHING MBGHANISM Pon AUTOMATIG WEETBBPLEN'ISEING LooMs.

APPLICATION FILED JUNE 2G, 1907. QQJKSKQ, Patented July 13, 1909. 4SHEETS-SHEET 2.

G. H. LBITNER & W. E. JOHNSON. P10K MATCHING MEGHANISM PoR AUTOMATICWEET REPLBNISHI NG Looms.

APPLICATION FILED JUNE ZG, 1907A mwa T 9 1m 1H 3s 11. n ,wm .JM d4. n.mw a P Snom/tow G. H. LEITNER da W. E. JOHNSON. P10K MATCHING MBGHANISMTOR AUTOMATIC WBTT REPLBNISHING Looms.

APPLIATIONFILED JUNE 2G, 1907. 927,562, Patented July 13, 1909, 4BHEBTB-BHBBT 4.

Eig. 9.

Hommt *inerenti* @einen GEORGE H. LEITNER AND WILLAM F. JOHNSON, OFAUGUSTA, GEORGIA, ASSIGNORS TO DRPER COMPANY, OF HOPlClL-HJE,

lllASS AOHUSETTS, A CORPORATION OF MAINE.

Specification oi" Letters Patent.

Patented July 18, 1909.

Application Bled June 26, 1907. Serial No. 380,897.

To all'. I11i/ioni 'it' may concern.:

Be it. known that We, (li-:onen ll. lini'iniei: and lViLLAM E. JOHNSON,citirfaens of the United States', residing a" iing'usta. in the countyot Richmond and State ot them-gia, have invented certain new and usefullmproveii'iei'its in Pick-Matching Mechanism tor AutomaticlVct-l'icplenishing Looms, of which the following is a speciticatiifm.

The purpose the. present invention is to match the pick in donhli-r-lorkautoinatii-, we'lft-replenishingl looms in order that there may be noblemish in the cloth in the case of looms employing a multiplicity othai'- nessee.

The present 'iinpiinfement.--l will he dcsci'iher. :is applied to 'thewell known Draper or Northrop loon shown in United States tatent Ee..52S),t iloveniher 2i", i90-'lin 'which fresh hohhin is Supplied to therimning shuttle in cage ot vv'eft-ahsenec, and when loom is equippedwith three harnesses. The improvements involve no alteration in theautomatic wett-Supply mechai.- ism, nor in the Shedding mechanisui'iwhich continues to act .in ite normal manner throughout the entireperiod ot' weft-ahseiice detection, picli-nmliching. andwetti'eplenishing'. Hence it is only niiccseary, for aninidei'staiiiling4 et the iinpri'n'einenl-i, to illue'ti'ate and de ihethoee added and altered 'features o'l the above mentioned Draper loopwhich directly contribute to the performance of matching Athe pick.These features are shown in the accompanying drawings, wherein-- Fairel, is a diagram illiistrating action in case the detector at the aide ofthe loom remote from `the weft-Supply lirst deftects nett-absence, thisSide in the 'illustrated loom, being the left-Side. Fig. Q, isa similardiagram illnetratiiig the action when the detector at the 'weft-Supplyside rst detects it'erttlftliaeiice, this being the right-Side, as hereShown. 3, is a plan View of the. detector and associated mechanism atthe left side. Figf 4, is a vertical section of the devices shown inFig. 3. 5, is an niidcrsifle view of the coupler at. the lett side.Figs. G, and 7, are vertical sections the of parts of themechanismshownin Fig. 3,

showing-"difciwm positions ot' the coupler. S, is a vertical sectionlooking toward the devices shown in Fig. 3. Fig. 9, is a plan view ot'the detector and associated 55 devices at the right Side of the loom.Fig. l0, is a vertical section through the starting or change-shaftlooking toward the connecting mechanism whereby the right detector isrendered idle when the li-"t detector first detects weft absence. Fig.11, is a side view ot the inner end 'of the detector slide at the rightside. Fig. l2, i# a vertical section through the inner end at therightdetector slide. Fig. 13, is a ross section of the right detectorSlide.

n the particular three harness loom to which the improvements have heenapplied the wett-supi'ilying mechanism is at the right. Two weft-absencedctci'etors consisting` of eide weft-forks of iisiial construction areemployed, and to distinguish them they will be designated as the mainfork A, and the companion fork Il, respectively.

The inaitching,Y of the pick will be readily understood by reference. tothe diagrams F and f2, in which the shed-'formation and the picking areciniventionally shown.

ltefcrrin f to Fig. l, let it he assumed that the wett fails when theShuttle is traveling to the left, as indicated by the line partly fiilland partly dotted at pick No. l. The main fork A, which at the left sideot the loom, then detecte weft-absence. This is followed by five idle orblank picks with the empty shuttle, as indicated hy the dotted lines atnicks Non. 2, 3, 4, 5, and (i. During these idle picks, the harnessescontinue to change and progress in normal order. At the end of ick No.(3, the empty shuttle is at the enppy (right) :side o'll the looin andthen receives a treeh Supply of weft. "'lielt No. 7, is to the left andlays the strand of 'fresh we'lt in the saine Shed formation as that inwhich the failure occurret. Hence there can never be a Shed which doesnot contain a 'iill' nek, although a shed may contain a )artial pickalso, in the event that the main :tork detects Weft-ahSence.

Fig. 2, shows the action in case the coinpanion fork B, (at the rightSide ot the loom) .first detects weft-absence, as when the we'l't failswith the shuttle travelingr from 4lett to right as indicated at pickNo. 1. This is 'followed b two blank picks Noe. 2, and 3, 105 at the endo'lywhich the empty Shuttle is at the Supplv side where it receivesfresh weft.

The fom-th pick lays a strand ot fresh weft;

and, since the harnesses have been shift-ing in normal sequence, thefresh strand is laid in the same shed-formation as that in which thedeciency occurred. ln this case. also, there can never be less than afull piel: in. any shed.

The foregoing actions involve a differential delay in the replenishmentof weft depending upon which fork first detects; and the diii'erenee inthe number of blank picks is just equal to the number of harnesses. ltis evident that, during the blank picks, the two forks alternatelydetect weft-absence. lrovision is made to compensate for these extradetections. Also, the action of the take-up is stopped so as to preventa thin place in the cloth.

The main .fork A, and its associated devices will first be described, inconnection with Figs. 3 to S inclusive. The fork itself is of usualconstruction and is mounted as usual in a forli-slide C, which slidesback and forth in a guide stand D, fast on the breast-beain- The forkcooperates with a weft-hammer E, of known construction and timing; andthe slide C, is pressed rearwardly or inwardly by a customary spring a.The weft-fork and slide coperate with the customary starting or 'changeshaft F, of the Draper looin to put the weft-supply into action; and, asall the connections between this starting or changeshaft and theweftsupplying mechanism remain unaltered, nothing except this shaftis'slfiown,` since it sufciently identities the weft-supplyingmechanism. In the present case, however, the arm Gr, fast onv the changeshaft does not directly coperate with the slide C, as in the Draperloom; but indirectly through a normally idle coupler H, which is mountedon the slide C, and has an independent forward and back movementthereon. This coupler is mounted on the slide, and is constructed likethe so-called latch-carrier shown in United States Letters Patent No.789,291 to Jonas Northrop, dated May S), 1905, but with thecharacteristic difference that inv said patent it cooperates withaknock-ell' lever to stop the loom after a succession of detections ofweft-absences, whereas in the present case, kit coperatcs with the armG, of the change shaft to roel; said shaft to cii'ect the supply offresh weft. lt will Sufice, therefore, to mention the structure landoperation of the coupler so far as they are important in connection withthe new result achieved.

The coupler has three positions relatively to the slide C, in the outertwo of whichf Fig-s. 5, and (i) it is idle relatively .to the arm G.When, however, it occupies its third or innermost position, (Figs. 7,and ti) it then encounters the arm G to eifcet weftsupply when the slideC, nest nieves ferward under the action of the weft-hammer.

esc/gees At one side the coupler has a depending dagger, which in itstwo forward or outward positions is above the adjacent end of Vthe arinG; but when the coupler is in its innermost position this dagger dropsdown behind the arm G, so as to 'encounter it as the slide C, movesforward.

The slide C, has a series of notches, c, d, c, with which lugs f, f, onthe coupler engage thus determining the three different positions of thecoupler. Normally, the lugs f, f, occupy the outer notches 0, and then adepending shoulder g, vof the coupler is 'back and in the plane of astop h, on the 'fixed guide stand D; while depending feet il, i, of thecoupler rest on lateral lugs j, j, of the slide C. ln Fig. 7, the stopl1., is omitted to show more clearly one of the lugs If now the fork A,detects weft-absence it' is caught by the hoolr la, of the'weit-haininenand the slide C, is moved forward a definite distance. Thecoupler H, does not niove all the way with it, being stopped, itsshoulder g, en-

'countering the stop 71,. Hence, as the slide (l, completes its forwardmovement, its notches c, pass forward of the coupler lugs and theintermediate notches d, register with said lugs. At `the saine time thelugs y', .i

of the slide C, pass forward of the feet ,.of the coupler which thenassumes an inclined position. When the slide C, is again pushed back bya spring a, it carries the coupler with it, which then occupies itsmiddle and inclined position, as shown in F ig. 6. 0n the next followingdetection of weftabsence by the fork A, (following piet 3 in Fig. l),the slide C, again moves forward with it, but the coupler does not'rnoveall the way forward because the dropping of its feet i', from the lugsj, and the conseq ent inclined position of the coupler has brought asecond shoulder Z, of the coupler in the plane of the ixed stop it.Hence, the coupler lugs f, now drop into the deep rear notches c, of theslide. rlhen. when the slide is agaim moved back by the spring a, thecoupler is carried with it, and its front end drops to its lowestposition with its dagger Z), back of, and 1n forward too, owing tolaterai arms in, m/of vthe coupler being then gust forward ot standardsn, e, of vthe slide C. During this forward movement, the coupler dag ereucounters the change shaft arm Gi, andY the supply of fresh weft isinstituted, thetiming of the parts being such that the fresh weft isYsupplied when the shuttleis at the supply side following piclr 6, inlfig. 1...*lhcf coupler then goes haelt` with tho slide U; but, st thenext succeeding forward stroke of the wefthammer (which is inellectiveon the slide since the fresh thread tilts the fork A), it encounters therear end of the coupler and moves it forward to its normal idle positionwith the lugs f, in the `liront notches c. Hence, the successivedetections of the fork A, are inellective to govern wett-supply nntiithe successive rearward steps oit the vcoupler bring it into activerelation with the change shaft arm. ln the case oit' three harnesses,two successive rearward movements ot the coupler involve a sollicitentdelay to insure the t'resh pick being laid in the con rect shed.

ln the right or companion fork B, first de cts wett. absence, the actionis for its 'wefnhennner to catch the fork, move the wett fork slideforward, and rock the change in the normal action of the Draper loom;since the rigid-hand arm l., fast. on the change shaft if, is directlyencountered by the right hand fork-slide J, as shown in Fig. 9. Theweft-hammer cam at the right, however, does not have su'flicicnt throwto rock the changeshaft far enough to eli'cctweft-supply, so that nowett is supplied when the shuttle is in the wrong (or leftliand) 1t isobvious, also, that before the ley is forward, following pick No. 3, inFig. 2, the right slide J will have n'ioved back again so that notransfer ot fresh weft can then be elected. Hence, in this ease also,the transfer of fresh weft is controlled by the main fork; and, byreason of its coupler ll, being brought into action by the cinnpanionfork.

When the coupler is in its forward idle position, a coupler controllerK, (consisting of a. pivotcd lever shown in Figs. 3 and 8) is heldpressing lightly against an abutment.

L, on the coupler by a coiled spring M, whose opposite ends are attachedrespectively 'to said controller and to the changesliat't arm tlf,respectively. When now, the change-shaft, is rocked as the result otdetection by the companion fork, the spring M, is pnt nnder grentcrtension, and the controller is swung so as to pnshythe coupler at' onceback to its innermost and active position. Hence, when the main forkdetects (following picklio. 2, Fir?. 2), the changes'naiit' is againrockedand tnis time in proper time to insert fresh weft when the emptyshuttle in the right-hand box following ick No. ll, Fig. 2. Hence, thevfresh weit is laid in the correct shed when the oom- Vpenion 'i'ork B,first detects.

Correct operation demands that the companion forli l, should be renderedinactive following the blank picks of the empty shuttle at pick No. 3,in Fig'. 2, and at picks Nos. i.

4'-, nnd 6, in Fig. l. To this end the chant, att ll, is surrounded by aloose sleeve rl, which at. opposite ends has rigidly secured upwardprogecting arms O, and l).

The left hand arm t), has a lateral arm Q, in the path ot' a. part otlthe left-slide C, (Figs. 3, and 5) so'thatwhenever slide C, movesforward the sleeve N is rocked. This swings the upper end ot' the righthand arm l), (Fig. l0) forward. This arm 1, has a lateral pin ll,extending into a slot t, in the lronl cod of a .rod S, which at its rearend has a disarmer T, consisting of a laterally projecting' pin whichextends through a cani slot ll, in the wall of the right. slide J,beneath thc weft-fork tail V, at one sidc. A spring W, connects the rodS, and the slide il. When, now, the left-slide (l, moves for wardrocking the. sleeve N, the rod S, moves forward, thns causing' thedisarmer T, to ride up the cam slot U, and hence to lift, the fork tailV, above the path otl the weft hammer hook (Fig. i9),- so that the slideJ, can notbe moved forward either following blank picks 2, il, and l5,in Fig. l, nor following blank pick 3, in Fig. 2. llcnce, the companionfork is rendered inactive,in the sense that it is so controlled that il.cannot occupy a cooperative position with the parts governed by it, andhence cannot all'ect the weftsupplyingr mechanism nor the action of themain l'ork. Also, thc companion fork is thus rendered inactive each timethe main fork acts, and hence several times in succession during theweft-replenishing period in case the first detection by the main fork.

The change-shaft l?, is connected as usual lo the take-up to render itinactive whenever the change-shaft is rocked, as through arm X, (Fig. 8)fast. on the change-shalt. This is not. suliicicnl. in the presentinstance to prevent a rhin place; and, hence, to avoid a thin place, tla action ot' the lake-up is also stopped by a governor Y, depending fromthe sleeve N, (Fig. nl) and hence working whenever the slide (l, movestolwvard, and independent of the rocking; o'lf the changeshaft l?.

The sleeve N, with its arms and l), is normally maintained in theposition shown in Figs. 5, and l0, by a suitable spring, such as thespring o, shown in Fig'. 5. The change-shaft F, is normally maintainedin the position shown in Figs. 2l, 8, and S), by

a springl notshown, but similar to that used in the Draper loom, and asshown, for example, at d, in United States Letters Patent oli JonasNorthrop, No. 718,575, January 13, 1903.

The principles of this invention are appli- `ablc to any odd number ofharnesses or shed-'formations. It is only necessary that the couplershould receive an appropriate number of backward steps when the mainfork first detects; and that it should be given an appropriatecompensating or differential initial backward movement when thecompanion fork first detects.

Pick matching' is secured by this invenlllO lll5

tion with but few and simple changes and additions to the Well-knownDraper double- Ifork automatic weft-replenishing loom.

l/Ve claiml. An automatic weft-replenishing piek matching` loom having,in, combination, lthree harness and picking mechanisms which continuetheii` normal operation during weft-absence detection and lweft-replenish ment; la weft-supplying mechanism at one side only of theloom; a change shaft gewr erning the action of the weft-supplyingmechanism; two weft-absence detectors, one at each side of the loom; anormally idle coupler between the main detector and change-shaft;mechanism between said main detector and coupler whereby at each of twosuccessive detections ei weft-absence by the main detector the coupleris moved one step and at the second step the coupler connects the maindetector and the change shaft so that at the third successive detectionof weft-absence by said main detector the change-shaft is actuated.;connections between the companion detector at the supply side of theloom and the coupler whereb `when the companion detector detects wettabsence the coupler 1s moved at once into coupling?)` position; andmeans governed by the main detector to render the com anion detectorinactive at each detection o weft absence by the main detector.

2. An automatic weft-replenishing pickmatching loom having, incombination, three `harness and lplcking mechanisms which continue theirnormal operationdur ing Aweft-absence detection andweit-repitanislnnent; a weft-supplying mechanism; two weft-absencedetectors, one at each side of the loom; a normally idle coupler betweenthe main detector and the weft-supplying mechanism; mechanism betweensaid main detector and coupler whereby at each of two successivedetections of weft-absence by the main detector the coupler is moved onestep and at Ythe second step the coupler connects the main detector andthe'weftssnpplying mechanism so that at the third successive detectionof weft-absence by said main detector the weft-supplying mechanism isput into action; connectionsI between the companion detector and thecoupler whereby when the companion detector detects weft absence thecoupler is moved at once into coupling position; and means governed bythe main detector to render the comanion detector inactive at eachdetection o wettabsence by the main detector.

3, An automatic weft-replenishing pickmatching loox.L having, incombination, three harness and picking mechanisms; a wett-supplyingmechanism at one side only of the loom; two weft-absence detectors, oneat each side of the loom; a normally idle coupler between the maindetector and een-ece the weft-supplying mechanism; mechanism betweensaid detector and coupler whereby at each of two successive detectionsci weitabsence by they main detector the coupler is moved one step andatv the second step the coupler connects the inaindetector and 'theweftsupplying mechanism that third successive detection of wert-absenceby said main detector the weftsapplying meeh-4 anism is putinto'aetion;'a.nd connections between the companion detector at the sup- `plyside of the loom and the conpler whereby when the companion detectordetects weft absence the coupler is moved at once into couplingposition.

s. An automatic weft-relenishing loiei.n matching loom having, inconibinatienE three harness and 'Kicking mechanisms; a

weft-supplying mec anism; two weft-aim sence,- detectors, one at eachside of the loom; a normally idle coupler between the main detector andthe weitsnppiyingmechanism; mechanismV between vSaid detector andcoupler whereby at each of'itwo sncces-- sive detect-ions ofweft-absence by the'main detector the coupler is moved one step and atthe second step the coupler connects the main detector and theweft-supplyiiigmech anism so that at the third successive detection ofweft-absence by said main detector the wetsupplying mechanism is pntinto action; connections between the companion detector and the couplerwhereby when the companion detector detects weit absence the coupleristmoved at enceinte coupling posih tion; and means governed by themainY detector te render the companion detector inactive at eachdetection of weft-absence by the main detector.

5. An automatic. weft-iplenishing pickmatching loom having, incombination, three harness and picking mechanism; a weftsupplyingmechanism; two weft aiosence detcetors, one at each side of the loom; anormally idle coupler between the main detector :1nd the weft-supplyingmechanism;

mechanism between said detector and coupler whereby at each of twosuccessive deteetions ot' welt-absence by the main detector the coupleris moved one step and at the second step the coupler connects the maindetector and the wett-siipplying;r mechanism so that at the thirdsuccessive detection of wet-absem-e by said main detector theweftsupplying mechanism is put into action; and connections between thecompanion detector and the coupler whereby when the companion detectordetects weft absence `the coupler is moved at once into couplingposition.

(i. An automatic wett-replenishingqfpickmatehiim loom having, incombination,-three harness and picking' mechanisms; a weftsupplyingmechanism at one side only o'fthe loom: two weft-absence deteettssgoneatI at the 5 lli" each side of the loom, which control the action of theweft-supplying mechanism; and means governed by the main detector torender the companion each of the several detections of the weftabseliceby the main detector during the weft-replenishing period.-

7: An automatic wet't-replenishing pickmatching loom having, incombination,

picking and shedding mechanisms which inaintaln their normal actionthroughout weft-absence detection and weft-replenishment; aweft-supplying mechanism at one side only of the loom; two wett-absencedetectors, one at, each side ot' the loom; a change shaft which governsthe action ot' the weft-supplying mechanism; a normally idle couplerbetween the main detector and said change-shaft; mechanism between saiddetector and the coupler whereby at each detection ot' weft-absence bysaid main detector the coupler is moved one step toward operativeposition, a plurality of such steps bringing said coupler into operativerelation between the main detector and the change shaft; mechanismbetween the companion detector and the coupler which moves said .couplera plurality ot' steps when the companiony detector detects weft-absence;intermediate connections each time the main detector detectsweftabsence; and means for rendering the takenp idle whenever eitherdetector detects weft-absence.

S. An automatic weft-replenishing pickmatchino loom having, incombination, picking an shedding mechanisms; a weftsupplyi'ng mechanism;two weft-absence detectors, one at each side of the loom; a normallyidle coupler between the main detector and the weft-supplying mechanism;mechanism between said main `detector and the coupler whereby at eachdeteotionof weftabsence by said main detector the coupler is moved oneste toward operative position, a plurality ot such steps bringing saidcoupler into operative relation between the main detector and theweft-supplying meehanism; mechanism between the companion detector andthe coupler which moves said coupler a plurality of steps when .thecompanion detector detects weft-absence; and intermediate connectionsbetween the two detectors to render the companion detector inactive eachtime the main detector detects weft-absence. M

9. An automatic weft-replenishing pickmatching loom having, incombination, pickdetector inactive at the companion detector between thetwo .detec-v tors to render the companion detector inactive ing andshedding mechanisms; a weftsnpplying mechanism; two weft-absence.tlctectors, one at each side of the loont; `a normally idle couplerbetween the mam detector and the wei'tfsupplying mechanism; mechanismbetween said main detectoizand the coupler whereby at each detection of-wet't-absence by said main detector fthe coupler is moved one steptoward operative position, a plurality of such steps bringing saidcoupler into operative relation between the main detector and theweft-supplying mechanism; and mechanism between the companion detectorand the coupler which moves said coupler' a plurality of steps whendetects weft-absence.

l0. An automatic wett-replenishing pickmatching loom having, incombination, picking and shedding mechanisms; a weftsnpplying mechanism;two weft-absence detectors, one at each side of the loom; mechanismbetween tlie main detector and theweftsupplying mechanism whereby afterVa 'phirality of successive detections by the main detector theweft-supplying mechanism is put into action; and mechanism between lthecompanion detector and the main detector which accelerates the operativeaction of the main detector. *i ,h

11.` An automatic weft-replenishihg pickmatching loom having, incombination, three harness and picking mechanisms; a weftsupplyingmechanism; two weft-absence detectors, one-at each side of the loom anormally idle coupler between the main detector and the weft-s )plyingmechanism; median-'- ism between sai detector and coupler where by ateach of two successive detections of weft-absence by the maindetectoi-the coupler is moved one step and at 'the second ste thecoupler connects the main detector anc the weft-supplying mechanism sothat at the third successive detection of weftabsence by said maindetector the weft-supplying mechanism is put into action; connectionsbetween the companion detector at the su ply side of the loom and thecoupler where y when the companion detector detects weft-absence thecoupler is moved at once into coupling position; and means for renderingthe take-up idle whenever either fork detects weft-absence.

In witness whereof we alix our signatures in presence of two witnesses,

GEORGE H. LEITNER. TILLIAM E. JOHNSON. Witnesses:

An'riinn S. BnowNn, (leo. l1. Gnuciin.

